Code Block Group Retransmission Across Codewords
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in code block group retransmissions, leading to excessive and inefficient utilization of network resources due to unbalanced retransmission of code block groups on multiple codewords.
Innovation Solution
A method and apparatus for wireless communication that allows for retransmitting failed code block groups using a different codeword while concurrently transmitting a new transport block, balancing the retransmission load across codewords.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If code block groups are retransmitted using multiple codewords, then retransmission coverage is improved, but network resource utilization becomes unbalanced and inefficient
Solution Approach 1:
The patent applies local quality by differentiating the treatment of code block groups based on their specific failure conditions. Instead of uniformly retransmitting all failed code block groups across multiple codewords, the system selectively identifies which code block groups failed and retransmits only those specific groups using appropriate codewords, thereby optimizing resource allocation while maintaining reliable delivery
Solution Approach 2:
The patent changes the parameter of codeword assignment dynamically based on failure detection results. By monitoring which code block groups fail and adjusting the codeword selection accordingly, the system adapts the retransmission strategy to match actual network conditions, improving both reliability and resource efficiency
2Device complexity
If code block groups are retransmitted on the same codeword, then resource allocation is simplified, but retransmission efficiency decreases due to unbalanced load
Solution Approach 1:
The patent introduces dynamic codeword selection for retransmission, where the assigned codeword changes based on real-time failure detection results. This dynamic approach allows the system to balance the retransmission load across available codewords, improving throughput and efficiency while maintaining manageable complexity through systematic selection rules
3Productivity
If new transport blocks are transmitted while retransmitting failed code block groups, then channel resource utilization is improved, but transmission complexity increases
Solution Approach 1:
The patent enables continuous useful action by allowing new transport blocks to be transmitted concurrently with retransmission of failed code block groups. This overlapping operation ensures that the communication channel remains continuously productive rather than idle during retransmission, maximizing resource utilization while managing complexity through coordinated scheduling
Solution Approach 2:
The patent segments the transmission task into independent code block group units that can be handled separately. This segmentation allows new transport blocks to be interleaved with retransmission operations without creating complex interdependencies, making the overall transmission management more tractable while improving channel utilization
Data Source
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AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter device may transmit, using a plurality of codewords, a plurality of code block groups, wherein the plurality of codewords includes a first codeword associated with a first set of code block groups, of the plurality of code block groups, and a second codeword associated with a second set of code block groups of the plurality of code block groups. The transmitter device may retransmit, after a failure associated with at least one code block group of the first set of code block groups, the at least one code block group using the second codeword. In some aspects, the transmitter may retransmit the at least one code block group using the first codeword and transmit a new transport block using the second codeword. Numerous other aspects are provided.